5051015991 has 36 divisors (see below), whose sum is σ = 8495197464. Its totient is φ = 2883535200.

The previous prime is 5051015989. The next prime is 5051016007. The reversal of 5051015991 is 1995101505.

5051015991 is a `hidden beast` number, since 5 + 0 + 510 + 1 + 59 + 91 = 666.

It is not a de Polignac number, because 5051015991 - 2¹ = 5051015989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5051015971) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 511521 + ... + 521301.

Almost surely, 2^5051015991 is an apocalyptic number.

5051015991 is a deficient number, since it is larger than the sum of its proper divisors (3444181473).

5051015991 is a wasteful number, since it uses less digits than its factorization.

5051015991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10972 (or 10962 counting only the distinct ones).

The product of its (nonzero) digits is 10125, while the sum is 36.

The square root of 5051015991 is about 71070.5001459818. The cubic root of 5051015991 is about 1715.7720194870.

The spelling of 5051015991 in words is "five billion, fifty-one million, fifteen thousand, nine hundred ninety-one".